438 REPORT OF NEW JERSE.Y SiTATE MUSEUM. 



latter longer. First ambulatory leg stouter than remaining ones, 

 propodus a little swollen, with very short dactyl, and merus much 

 longer than those of chelipeds. Of remaining ambulatory feet 

 second pair longest, slender, all joints elongated and slender, so 

 that dactyl of second pair nearly four times longer than that of 

 first pair. Segments of post-abdomen much broader than cara- 

 pace in female and third and fourth broadest. Color trans- 

 lucent whitish generally. Upper surface of carapace and median 

 region of post-abdomen red to pinkish. Minute eyes brownish. 

 All limbs whitish. Length of carapace ii mm., width of carapace 

 14 mm., and greatest width of post -abdomen 17.5 mm. 



Remarks. — Distributed along the eastern coast of the United 

 States from Cape Cod to Florida. I have examined many 

 examples from Great Bay, Corson's Inlet, Cape May, Green Creek 

 and Dias Creek, besides various other places along the shores of 

 Dtelaware Bay. In all these cases I have only seen the female, 

 as found commonly in the oyster {Ostrca virginca). 



Outside of New Jersey I have met with it, along the coast of 

 Delaware at Rehoboth, various places in Maryland about Chesa- 

 peake Bay, and at Chincoteague, Watchapreague and Norfolk in 

 Virginia. Mr. W. T. Davis has found it near New York City. 



Family GRAPSID.^. 



Carapace depressed or moderately convex, mostly quadri- 

 lateral edges straight or slightly arcuate. Front never very nar- 

 row, generally decidedly broad. Orbits and eye-stalks of mod- 

 erate size. Third maxillipeds with palp articulated at apex or at 

 front outer angle of merus. Chelipeds in adult male usually sub- 

 equal, moderately developed. Seventh joint of walking legs styli- 

 form, compressed, either smooth or spiniferous. Pleon at base 

 usually covers whole width of sternum between last pair of legs. 



Many forms included in this family burrow in muddy banks, 

 others live under logs and drift about wharves, wood piles, etc. 

 Still others are abundant under stones, on mud flats in salt or 

 brackish water. 



